Feature: 1. [Accurate Monitoring] Equipped with high accuracy electrochemical sensor and NDIR technology, this air quality monitor ensures accurate measurements and can detect CO2 concentrations within the range of 400 to 6000PPM (±50PPM or ±10%). 2. [Real Time Data Display] The monitor refreshes data every 2 seconds, displaying real time CO2 concentration, PM2.5, TVOC, HCHO, PM1.0, and PM10 levels, providing you with up to date information on indoor air quality. 3. [Mobile APP Monitoring] You can monitor air concentrations at home anytime through mobile APP, timely turn off the screen, and store data for 60 days. 4. [Long Battery Life] The air quality tester is built with 2000mAh battery and comes with USB charging cable. Once fully charged, it can operate continuously for 7 hours or more. 5. [Low Power Consumption] Featuring low power consumption chip, this air quality monitor can conduct uninterrupted long term monitoring of air quality, providing consistent care for the health of you and your family. Specification: Item Type: Indoor Air Quality Monitor Material: ABS Use: The 9 in 1 indoor air quality monitor can accurately detect PM2.5, PM10, PM1.0, CO2, HCHO, TVOC, Time, Temperature, And Humidity, all displayed on a high definition color screen for easy recognition and reading. With its convenient design, you can monitor the environment at any time and effectively measure and assess air quality Battery: 1 x lithium battery (built in) Battery Capacity: 2000mAh. Package List: 1 x Indoor Air Quality Monitor 1 x Instruction Manual 1 x USB Charging Cable Note: Do not use it when charging or when the battery is low, as the data may not be accurate.